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Avian Use of Purple Loosestrife Dominated Habitat Relative to Other Vegetation Types in a Lake Huron Wetland Complex

Table 5


TABLE 5. Mean density (no./ha) ± SE of the six most commonly observed bird species by vegetation type in Saginaw Bay wetlands, 1994-1995.
   Sedge Wren  
         1994   1995  

Marsh Wrenb

Yellow Warbler  

Common Yellowthroatb

 

Swamp Sparrowb

Red-winged Blackbird
Vegetation typea Period 2b Period 3b   Period 2b Period 3b  Period 2b Period 3b  Period 2b Period 3b
SS 0 C 0 C   0 B

0 B

0 C

9.3 ± 1.0 A

14.7 ± 1.0 A

2.7 ± 0.6 Be

11.3 ± 1.8 C

17.3 ± 1.8 A

6.0 ± 1.8 Ag

WM/SS 6.7 ± 1.6 B 3.0 ± 1.6 BC   0 B

10.0 ± 1.9 A

0 C

3.3 ± 1.3 B

2.0 ± 1.2 B

5.3 ± 0.8 A

21.5 ± 2.3 B

0 C

0 B

WM/SS/LS 10.0 ± 1.9 AB 0 C   6.7 ± 2.2 Ad

3.3 ± 2.2 B

0 C

2.8 ± 1.4 B

1.7 ± 1.6 B

1.5 ± 1.0 BC

27.8 ± 2.8 B

7.1 ± 2.7 Bf

1.7 ± 2.9 AB

WM/LS 0 C 6.7 ± 2.2 Bc   0 B

0 B

0 C

0 B

0 B

0 C

44.2 ± 2.9 A

0 C

0 B

WM 13.3 ± 2.2 A 13.3 ± 1.6 A   3.3 ± 1.6 AB

3.3 ± 1.6 B

0.5 ± 1.9 C

0 B

0 B

1.4 ± 0.8 BC

21.2 ± 2.2 B

6.7 ± 2.4 Bf

4.2 ± 2.0 AB

IC 0 C 0 C   0 B

0 B

15.6 ± 1.8 B

0.7 ± 1.0 B

0 B

0 C

9.6 ± 2.1 C

5.7 ± 1.9 BC

4.4 ± 2.4 AB

CC 0 C 0 C   0 B

0 B

20.6 ± 1.2 A

0 B

0 B

0.2 ± 0.5 C

1.5 ± 1.4 D

1.8 ± 1.4 BC

1.2 ± 1.4 B

CB 0 C 0 C   0 B 0 B 0.5 ± 2.0 C 0 B 0 B 0 C 0 D 0 C 0 B
a Vegetation types: SS = scrub-shrub, WM/SS = wet meadow/scrub-shrub, WM/SS/LS = wet meadow/scrub-shrub/loosestrife, WM/LS = wet meadow/loosestrife, WM = wet meadow, IC = inland cattail, CC = coastal cattail, CB = coastal bulrush.
b Means within columns followed by the same letter do not differ (P > 0.05) as determined by ANOVA and Fisher's least significant difference.
c Fisher's least significant difference multiple comparisons were not corroborated by 90% confidence interval comparisons with WM/SS/LS and IC (see METHODS).
d Fisher's least significant difference multiple comparisons were not corroborated by 90% confidence interval comparisons with WM/SS and WM/LS (see METHODS).
e Fisher's least significant difference multiple comparisons were not corroborated by 90% confidence interval comparisons with WM/LS (see METHODS).
f Fisher's least significant difference multiple comparisons were not corroborated by 90% confidence interval comparisons with WM/SS, WM/LS, and CB (see METHODS).
g Fisher's least significant difference multiple comparisons were not corroborated by 90% confidence interval comparisons with WM/SS, WM/LS, and CB (see METHODS).

Previous Section -- Table 4 -- Mean avian density, avian diversity, and number of plots by vegetation in Saginaw Bay wetlands.
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